// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_PEPPER_PPB_VIDEO_DECODER_IMPL_H_
#define CONTENT_RENDERER_PEPPER_PPB_VIDEO_DECODER_IMPL_H_

#include <stdint.h>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "media/video/video_decode_accelerator.h"
#include "ppapi/c/dev/pp_video_dev.h"
#include "ppapi/c/dev/ppp_video_decoder_dev.h"
#include "ppapi/c/pp_var.h"
#include "ppapi/shared_impl/ppb_video_decoder_shared.h"
#include "ppapi/shared_impl/resource.h"
#include "ppapi/thunk/ppb_video_decoder_dev_api.h"

struct PP_PictureBuffer_Dev;
struct PP_VideoBitstreamBuffer_Dev;

namespace content {

class PPB_VideoDecoder_Impl : public ppapi::PPB_VideoDecoder_Shared,
                              public media::VideoDecodeAccelerator::Client {
public:
    // See PPB_VideoDecoder_Dev::Create.  Returns 0 on failure to create &
    // initialize.
    static PP_Resource Create(PP_Instance instance,
        PP_Resource graphics_context,
        PP_VideoDecoder_Profile profile);

    // PPB_VideoDecoder_Dev_API implementation.
    int32_t Decode(const PP_VideoBitstreamBuffer_Dev* bitstream_buffer,
        scoped_refptr<ppapi::TrackedCallback> callback) override;
    void AssignPictureBuffers(uint32_t no_of_buffers,
        const PP_PictureBuffer_Dev* buffers) override;
    void ReusePictureBuffer(int32_t picture_buffer_id) override;
    int32_t Flush(scoped_refptr<ppapi::TrackedCallback> callback) override;
    int32_t Reset(scoped_refptr<ppapi::TrackedCallback> callback) override;
    void Destroy() override;

    // media::VideoDecodeAccelerator::Client implementation.
    void ProvidePictureBuffers(uint32_t requested_num_of_buffers,
        media::VideoPixelFormat format,
        uint32_t textures_per_buffer,
        const gfx::Size& dimensions,
        uint32_t texture_target) override;
    void DismissPictureBuffer(int32_t picture_buffer_id) override;
    void PictureReady(const media::Picture& picture) override;
    void NotifyError(media::VideoDecodeAccelerator::Error error) override;
    void NotifyFlushDone() override;
    void NotifyEndOfBitstreamBuffer(int32_t buffer_id) override;
    void NotifyResetDone() override;

private:
    ~PPB_VideoDecoder_Impl() override;

    explicit PPB_VideoDecoder_Impl(PP_Instance instance);
    bool Init(PP_Resource graphics_context,
        PP_VideoDecoder_Profile profile);
    // Returns the associated PPP_VideoDecoder_Dev interface to use when
    // making calls on the plugin. This fetches the interface lazily. For
    // out-of-process plugins, this means a synchronous message to the plugin,
    // so it's important to never call this in response to a synchronous
    // plugin->renderer message (such as the Create message).
    const PPP_VideoDecoder_Dev* GetPPP();

    // This is NULL before initialization, and after destruction.
    // Holds a GpuVideoDecodeAcceleratorHost.
    std::unique_ptr<media::VideoDecodeAccelerator> decoder_;

    // The interface to use when making calls on the plugin. For the most part,
    // methods should not use this directly but should call GetPPP() instead.
    const PPP_VideoDecoder_Dev* ppp_videodecoder_;

    DISALLOW_COPY_AND_ASSIGN(PPB_VideoDecoder_Impl);
};

} // namespace content

#endif // CONTENT_RENDERER_PEPPER_PPB_VIDEO_DECODER_IMPL_H_
